Answer:
it is more likely that both of the students will be boys because there are 14 boys and 8 girls. 14 is greater than 8. So, both of the students that are chosen will be boys,
(x+y=21
2x = 33+ y
Answer:
(18, 3 )
Step-by-step explanation:
Given the 2 equations
x + y = 21 → (1)
2x = 33 + y → (2)
Rearrange (2) expressing y in terms of x by subtracting 33 from both sides
y = 2x - 33 → (3)
Substitute y = 2x - 33 into (1)
x + 2x - 33 = 21, that is
3x - 33 = 21 ( add 33 to both sides )
3x = 54 ( divide both sides by 3 )
x = 18
Substitute x = 18 into (3) for corresponding value of y
y = (2 × 18) - 33 = 36 - 33 = 3
Solution is (18, 3 )
Answer:
Step-by-step explanation:
x+y = 21 —> (A)
2x = 33 + y — (B)
Form eq B
2x = 33 + y
Or y = 2x - 33
By putting the value of y in equation A
x + 2x -33 = 21
3x = 21 + 33
3x = 54
x = 54/3
x = 18
Now,
y = 2 (18) -33
= 36 - 33
= 3
Thus, s.s ={( 18,3)}
Number 2 is the answer